Woodworking-machine



w. R. HEWITT.

WOODWORKING MACHINE.

v I APPLICATION FILED SEPT. 10, 1919. 1,363,593, Patented Dec. 28, 1920.

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INVENTOR WILLMMBHZI VITZ ATTORNEY W. R. HEWITT.

WOODWORKING MACHINE.

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UNITED STATES PATENT QFMQE.

.WOODWQRKINGeMAGHINE.

Specification of Letters Patent.

Patentedlrec. 28, 122%).

Application filed September 10, 1919. Serial No. 322,921.

To all whom z't may concern Be it known that I, lVILLrAii R. HEW TT, a citizen of the United States, residing at the city and county 'of San Francisco and State of California, have invented new and useful Improvements in Woodworking-Machines, of which the following is a specification. J

This invention relates to a wood working machine, and particularly to an attachment therefor, by which timbers may be cut or punctured on all sides .preparatoryto treating the timbers with preservatives, such as creosote, and the like.

One of the objects of the present invention is to provide a simple attachment for edgers by which the timbers to be cut may be punctured on two sides before they are passed through the saws and then turned and punctured on the opposite sides, after passage through the saws. Another object of the invention is to provide an attachment which may be secured to the feeding and presser rollers employed; such attachment being capable of performing the puncture or cutting operation specified. Further objects will hereinafter appear.

Having reference to the accompanying drawings Figure 1 is a side elevation of a standard form of edger showing the application of the invention.

Figs. 2 and 3 are detail views of the cutting rollers.

Fig. 4 is a side elevation of the edger by which the timber is first out and punctured, said side elevation also showing the receiving table and a second pair of puncturing rollers by which the puncturing operation is completed.

iteferring to the drawings in detail, A indicates the main frame of a standard form of edger, and 2 and 3 a pair of feeding rollers, disposed at each end of the machine. Journaled centrally between the feeding rolls 2 and 3, as at 4, is an arbor 5, on which is secured one or more circular saws 6, and suitably secured to the main frame is an upper frame 7, in which is supported front and rear press rolls, such as shown at 8 and 9; the press rolls being journaled in the usual manner in rocker arms 10, which are spring-actuated, as at 11, to maintain the press rolls in forced contact with the timber to be out, said timber being shown at 12.

The real function. of an edger constructed as here shown is to receive a timber of considerable width and to out said timber into a series of sections of suitable size or dimensions. The front and rear feeding rolls, shown at 2 and 3, together with the press rolls 8 and 9, are provided for the purpose of feeding the timber through the saivs, and I have, therefore, taken advantage of the presentstructure to the extent that I form knives, spikes or the like on the faces of the several rollers, as shown at 1% and 15. These projections enter the upper and lower ce 0f he imber passing through the saws and puncture said surfaces to any depth desired.

The timber, when out, is delivered to a receiving table 16 and is supported thereon by means of a series of tubular rollers 17. An operator is placed on each side of the receiving table and their duty is merely that of turning the timbers; that is, the timber in passing through the edger is merely perforated on two sides and it is, therefore, necessary to turn the timbers and pass them through a second series of rollers positioned at the end of the receiving table, as shown at 18 and 19 to permit the opposite sides of the respective timbers to be perforated. All sides of the timbers handled are in this manner perforated in the machine shown and are ready to be crosscut, for instance, to form railway ties, or the like. They are, furthermore, ready for any preserving process, for instance impregnation with creosote, asphalt, sulfate of iron water, etc; the puncturing of the surfaces of the timber permitting a perfect penetration of the wood fiber.

Timbers prepared in this manner may be successfully used for piles intended to be submerged in sea water and they may also be employed for sewer timbering, founda tion timbers, underpinnings of dwellings, mine timbering, bridge timbers, telegraph poles, railroad ties, etc, as perforation of the outer surfaces permits the preserving compound to so penetrate the timber that it should not be affected by air, water, chemicals or the ravages of insects of different varieties.

I am aware that it is not new to perforate timber preparatory to treating the same with a preserving compound. Such a perforation has, however, been done by hand or special machinery, thus adding considerable expense. The purpose of the present invention is to reduce the actual expense involved by equipping standard wood working machinery with rollers such as described. This permits the timber to be cut by the saws and to be punctured or partly perforated at the same time, thus eliminating the necessity of re-handling the timbers and also of employing special machinery for this purpose.

Having thus described my invention, what I claim and desire to secure by Letters Patent is- 1. In an edger, the combination with the circular saws and the feed and pressing rolls operating in conjunction therewith, of means on the pressure rolls tor perforating the upper and lower surfaces of timbers passed through the saws.

2. In an edger the combination with the circular saws and the feed and pressing rolls operating in conjunction therewith, or" means on the pressure rolls for perforating the upper and lower surfaces of timbers passed through the saws, said means consisting of a plurality of projections formed on the surface of the rolls and said projections provided with cutting edges.

3. In an edger, the combination with the circular saws and the feed and pressing rolls operating in conjunction therewith, of means on the pressure rolls for perforating the upper and lower surfaces of timbers passed through the saws, said means consisting of a plurality or" semi-circular projections formed on the surface of the rolls and a cutting edge formed on the peripheries of said projections.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses. v

WILLIAM R. HEWITT.

Witnesses:

Liv. HEALLY, CHAS. M. FRYER. 

